Consider Type IIB string theory with 4 O7-planes and 32 D7-branes on $K3 \times \mathbb T^2/\mathbb Z_2$. The K3 induces D3-charge on their world-volumes which can be cancelled by the introduction of ...

I am not referring to the experiment being conducted at Lancaster University involving liquid helium and a magnetic field to build a marble sized representation of the early cosmos.
My question is: ...

I have a question regarding the so called large extra dimensions model (or ADD due to Arkani-Hamed, Dimopoulos and Dvali).
It is a extradimensional model with a 3brane to which SM forces and matter ...

My question is about the relation between the Kaluza-Klein 5-brane and the NS5-brane and the effective dimensionality of the KK5 brane.
To my knowledge, the KK5 is defined as the T-dual of the NS5, ...

In the paper ``Hierarchies from Fluxes in String Compactifications'' by Giddings, Kachru and Polchinski, the following example is considered for a localized source that may have negative tension (my ...

The following query is based on a reading of section 2.2 of a paper by Graña and Polchinski. The idea is to begin with the D3 brane action of the form
$$ ds^2 = Z^{-1/2}\eta_{\mu\nu}dx^\mu dx^\nu + ...

Theories in string theory and cosmology lead to an idea that our universe is a single "membrane" (or brane, as it is commonly called) suspended within a higher dimensional "bulk". See Wikipedia.
Is ...

Common wisdom says that only the top dimensional part of the brane scan of Green-Schwarz super p-brane sigma models is quantum consistent (the critical strings and the M-branes). But by the results in ...

It is now a common knowledge that "D-p branes are equivalent to p-branes" due to Polchinski's work.
Note that D-p branes are objects in string theory and p-branes are objects in blackhole theory. So ...

I have a one-semester background in string theory (bosonic string theory, the NSR string, conformal field theory), but I have not taken any full length courses on supersymmetry and supergravity. I'm ...

I would like to hear some reasons and ideas on how quivers are useful in SUSY gauge theories. There is a nice answer about the case of D-branes here but it is not clear on their appearance in gauge ...

I decided recently (to try) to learn String Theory, however from the beginning some newbie questions came up, which haven't given me a break. For this reason, I decided to ask some of them. I'd prefer ...

In Randall Sundrum model 2, that is the one with non compact fifth dimension, there is only one brane, which is the Planck brane. The TeV brane is removed by taking the radius of the fifth dimension ...

I'm a beginner in learning the AdS/CFT correspondence, and I come across two problems that I hope an answer will be given here.
D branes in string theory are usually introduced through the T-duality ...

I know that D$p$ branes are branes with $p$ spatial dimension with satisfying Dirichlet boundary condition.
I want to confirm the following things.
First, I heard the D-branes are massive, and these ...

I don't know much about Instantons, and looking through the Wiki page it seems like one must have a lot of knowledge about QFT to understand them. However recently I've encountered a statement (which ...